Folding tool for match-box making machines



y 1931. L. HENNINGER 1,804,613

FOLDING TOOL FOR MATCH BOX MAKING MACHINES Filed Sept. 4, 1929 2 Sheets-Sheet 1,

B1 Wk RM Mtarney May 12, 1931.

L. HENNINGER FOLDING TOOL FOR MATCH BOX MAKING MACHfNES 2 Sleets-Sheet 2 Filed Sept. 4, 1929 dm Hepnmger FIG. 3

INVENTOR'.

Patented May 12, 1931 GFEQE I TUDWIG HENNINGERQOF DUB-EACH, GERMZANY, ASSIG-N'OR TOBADISCHE MASCHINEN FABRIK & EISENG-IESSEBEI VOBIVIALS G. SEBOLD UND SEBQLD & NEFF, OF DUELACH,

GERMANY FOLDING TOOL FOR MATCH-BOX MAKING MACHINES Application filed September 4,1929, Serial No. 390,229, and in Germany June 16. 1928.

My invention relates to improvements in folding tools for match-box making machines, and more particularly for folding over or tucking in the edge of the paper of the inner boxes of match-boxes.

For the purpose of folding over the edge of the paper when winding the blanks of innently with the winder, or a rocking or oscil-' lating knife-like folding tool operated by a suitably designed cam is used.

The flanged rollers have inherent disadvantages in that reliable and elficient introduction of the edge of the paper into the winder groove is not ensured at all times, particularly at the winder corners. It has been attempted to prevent this by giving the flange a peculiar shape, but it was found that this endangers the entire edge of the paper. My invention does not relate to a cylindrical folding tool, but to knife-shaped rocking folders.

Prior to my invention folders with straight folding edges were used. When the sides of the winding mandrel and of the wall of the box stood substantially vertical the folder quickly forced the paper into the groove of the mandrel. The in and out movement of the straight-edged folder must be short and sharp so that the folder may pass out of the way of the winder with suificient certainty.

To ensure such rapid in and out motion of the folder it was necessary to provide very shallow recesses or slender curves on the circumference of the cam for actuating the folder and it was also necessary to run the machine slowly to enable the rollers contacting with the circumference of the cam and mounted on the folder lever to follow the shallow recesses as closely as possible. The slow speed above pointed out by curving the folding or tucking edge of the folder in such a manner that such edge remains inengagement with the groove during substantially the entire time required by any one side of the mandrel to move along the folder and only a comparatively short recession of the folder is necessary at each corner of the mandrel. The shape of the cam for actuating the folder is so corelated to the shape of the folder edge that the latter moves substantially recti- 7 linearly adjacent the base of the groove and thus effects perfect folding of the paper. By virtue of this corelation, the cam may be provided with substantially long curves which the cam roller can easily follow closely even at high operating speeds. The capacity of the machine is thus greatly increased and the quality of the work materially improved.

My improved mechanism is, furthermore, distinguished by its simplicity since a second supplementary tool with a special drive is not required An embodiment of my invention is illus trated in the accompanying drawings in which Fig. lis a cross-section of the device,

.Fig. 2 is a similar cross-section with th parts in different positions,

Fig. 3 is a side elevation, and

Fig. 4 shows the active part of the lift cam in natural size.

Referring to the drawings itwill be seen that the folder a is'mounted at the upper end of a lever Z) the lower end of which is secured to a stud shaft 0. On this short shaft main-shaft h of the machine and a coil spring 1' exerts sufficient pull on the lever b to ensure a close contact of the roller 6 with the periphery of the cam g.

in front of the folder or there is mounted upon the shaft the winding mandrel Z which is adapted to be rotated from the mainshaft h by means of a pair of spur wheels indicated by their contacting pitch circles m, n. The direction of rotation of the cam g and of the winding or wrapping mandrel is indicated by arrows. The box may be held on the mandrel by any suitable means common to this art, as for example by rollers which support the box, and the latter may be removed from the mandrel by any well known means such as stripping fingers moving lengthwise of the mandrel.

Fig. '1 of the drawings shows the roller 6 just about to leave the concentric or nonoperative portion of-the circumference of the cam and to enter the first relatively long recess or notch of the cam. The folding edge a of the folder at is just beyond the corner of the mandrel or box. Inasmuch as during the continuation of the rotation of the winding mandred Zthe roller 6 gradually approaches the center of the cam or shaft h, 0 ing to the curvature of its front edge the folder a soon enters the groove of the winding mandrel.

The curvature of the edge a the shape or configuration of the cam g and the rotation of the winding or wrapping mandrel Z are so corelated that the folding edge a remains at a short distance from the base or bottom of the groove of the winding mandrel and moves linearly in relation to the bottom of the groove thus folding the material.

l Vhen passing from one side of the mandrel to the other the folder at is moved outwards at a slightly higher speed, see Fig. 2,

so that it is able to pass out of the way of the corners of the mandrel or the box and to re enter the groove shortly after the corner has passed.

In comparison with the abrupt curves used heretofore those of the cam herein shown are very lOl'lg so that smooth operation is attained even at very high speeds of themachine. Due to the fact that the paper is comparatively gently applied to the box the quality of the product is also considerably improved. a

I claim as my invention 1. In a. box forming machine comprising a grooved mandrel a rocking knife-like folding member and acam. for continuously controlling said member, the folding edge of said member being so curved and the cam faces of said cam being so shaped that the curved edge of the folder during the operation thereof forms a substantially straight line adjacent the base of the groove along the sides of the mandrel and remains in said groove for substantially the entire time required by any one side of the mandrel to move along the folder.

2. A box forming machine, as claimed in claim 1, in which further cam faces of the said cam are so shaped that the curved edge of the folder during the operation thereof is moved outwardly from the groove at increased speed to pass out of the way of the corners of the mandrel and to reenter the groove shortly after each corner has passed beyond the path of movement of the curved edge of the folder.

In testimony whereof I. afiix my signature.

LUDWIG HEN NINGER.

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